diff --git a/keystore-engine/android_engine.cpp b/keystore-engine/android_engine.cpp
index d23f169..d9c99fe 100644
--- a/keystore-engine/android_engine.cpp
+++ b/keystore-engine/android_engine.cpp
@@ -217,7 +217,7 @@
   NULL /* mod_exp */,
   NULL /* bn_mod_exp */,
 
-  RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_OPAQUE | RSA_FLAG_EXT_PKEY,
+  RSA_FLAG_CACHE_PUBLIC | RSA_FLAG_OPAQUE,
 
   NULL /* keygen */,
   NULL /* multi_prime_keygen */,